In contrast to the first transmitter unfortunately this has a measurement error of about 5 ° at room temperature. The measured temperature is consistently too low. With outside temperatures in winter, the measurement error is even greater. This may well go to the range 8-10 °. If several other thermometers, the weather and my fingers are of the opinion it is 8 ° plus, that station displays zero temperatures.
More than the information whether there degrees in summer and winter is so you can not expect.